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    Vatalanib (PTK-787; ZK222584; CGP79787) 2HCl
    Vatalanib (PTK-787; ZK222584; CGP79787) 2HCl

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    This product is for research use only, not for human use. We do not sell to patients.
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    InvivoChem Cat #: V0515
    CAS #: 212141-51-0 Purity ≥98%

    Description: Vatalanib (PTK787 or ZK-222584, cpg-79787 2HCl) 2HCl is a novel, potent and orally bioavailable inhibitor of VEGFR2/KDR with potential anticancer activity. It inhibits VEGFR2/KDR with an IC50 of 37 nM in a cell-free assay, it is less potent against VEGFR1/Flt-1, and is 18-fold against VEGFR3/Flt-4. It is an anilinophthalazine analog with potent anti-proliferative activity in vitro and high in vivo antitumor efficacy. Vatalanib binds to and inhibits the protein kinase domain of VEGFR 1 and 2. This agent also binds to and inhibits related receptor tyrosine kinases, including PDGF receptor, c-Kit, and c-Fms. 

    References: Cancer Res. 2000 Apr 15;60(8):2178-89; Ann Surg Oncol. 2011 Feb;18(2):589-96. 

    Related CAS: 212141-54-3 (free base) 212142-18-2 (succinate)  

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    Molecular Weight (MW)419.73
    CAS No.212141-51-0 (2HCl)
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 85 mg/mL (202.5 mM)
    Water: 10 mg/mL (23.8 mM)
    Ethanol: 6 mg/mL (14.3 mM)
    Other infoChemical Name: N-(4-chlorophenyl)-4-(pyridin-4-ylmethyl)phthalazin-1-amine dihydrochloride.
    InChi Code: InChI=1S/C20H15ClN4.2ClH/c21-15-5-7-16(8-6-15)23-20-18-4-2-1-3-17(18)19(24-25-20)13-14-9-11-22-12-10-14;;/h1-12H,13H2,(H,23,25);2*1H
    SMILES Code: ClC1=CC=C(NC2=NN=C(CC3=CC=NC=C3)C4=C2C=CC=C4)C=C1.[H]Cl.[H]Cl
    SynonymsZK 222584 (cpg-79787) 2HCl;  ZK 222584; ZK222584; ZK-222584; PTK787; PTK 787; CGP 79787; CGP-797870; ZK-232934; PTK-787; ZK 232934; ZK232934; CGP79787D; PTK787/ZK 222584; CGP-7978.

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    In Vitro

    In vitro activity: Vatalanib also inhibits Flk, c-Kit and PDGFRβ with IC50 of 270 nM, 730 nM and 580 nM, respectively. Furthermore, Vatalanib shows the anti-proliferation effect by inhibiting thymidine incorporation induced by VEGF in HUVECs with and IC50 of 7.1 nM, and dose-dependently suppresses VEGF-induced survival and migration of endothelial cells in the same dose range without cytotoxic or antiproliferative effect on cells that do not express VEGF receptors. A recent study shows that Vatalanib significantly inhibits the growth of hepatocellular carcinoma cells and enhances the IFN/5-FU induced apoptosis by increasing proteins levels of Bax and reduced Bcl-xL and Bcl-2.

    Kinase Assay: The in vitro kinase assays are performed in 96-well plates as a filter binding assay, using the recombinant GST-fused kinase domains expressed in baculovirus and purified over glutathione-Sepharose. γ-[33P]ATP is used as the phosphate donor, and poly-(Glu:Tyr 4:1) peptide is used as the acceptor. Recombinant GST-fusion proteins are diluted in 20 mM Tris·HCl (pH 7.5) containing 1–3 mM MnCl2, 3–10 mM MgCl2, 0.25 mg/mL polyethylene glycol 20000, and 1 mM DTT, according to their specific activity. Each GST-fused kinase is incubated under optimized buffer conditions [20 mM Tris-HCl buffer (pH 7.5), 1–3 mM MnCl2, 3–10 mM MgCl2, 3–8 μg/mL poly-(Glu:Tyr 4:1), 0.25 mg/mL polyethylene glycol 20000, 8 μM ATP, 10 μM sodium vanadate, 1 mM DTT, and 0.2 μCi[γ-33P]ATP in a total volume of 30 μL in the presence or absence of a test substance for 10 minutes at ambient temperature. The reaction is stopped by adding 10 μL of 250 mM EDTA. Using a 96-well filter system, half the volume (20 μL) is transferred onto a Immobilon-polyvinylidene difluoride membrane. The membrane is then washed extensively in 0.5% H3PO4 and then soaked in ethanol. After drying, Microscint cocktail is added, and scintillation counting is performed. IC50s for PTK787/ZK 222584 or SU5416 in these as well as all assays described below are calculated by linear regression analysis of the percentage inhibition.

    Cell Assay: As a test of the ability of PTK787/ZK 222584 to inhibit a functional response to VEGF, an endothelial cell proliferation assay, based on BrdUrd incorporation is used. Subconfluent HUVECs are seeded into 96-well plates coated with 1.5% gelatin and then incubated at 37 °C and 5% CO2 in growth medium. After 24 hours, growth medium is replaced by basal medium containing 1.5% FCS and a constant concentration of VEGF (50 ng/mL), bFGF (0.5 ng/mL), or FCS (5%), in the presence or absence of PTK787/ZK 222584. As a control, wells without growth factor are also included. After 24 hours of incubation, BrdUrd labeling solution is added, and cells incubated an additional 24 hours before fixation, blocking, and addition of peroxidase-labeled anti-BrdUrd antibody. Bound antibody is then detected using 3,3′5,5′-tetramethylbenzidine substrate, which results in a colored reaction product that is quantified spectrophotometrically at 450 nm.

    In VivoVatalanib induces dose-dependent inhibition of the angiogenic response to VEGF and PDGF in both a growth factor implant model and a tumor cell-driven angiogenesis model after once-daily oral dosing (25-100 mg/kg). In the same dose range, Vatalanib also inhibits the growth and metastasesof several human carcinomas in nude mice without significant effect on circulating blood cells or bone marrow leukocytes.
    Animal modelNude mice injected via s.c. cells such as A431 epithelial carcinoma, Ls174T colon carcinoma, HT-29 colon carcinoma, PC-3 prostate carcinoma, DU145 prostate carcinoma, and CWR-22 prostate carcinoma cells.
    Formulation & DosageDissolved in distilled water containing 5% DMSO and 1% Tween 80; 25-100 mg/kg; Oral administration.

    Cancer Res. 2000 Apr 15;60(8):2178-89; Ann Surg Oncol. 2011 Feb;18(2):589-96. 

    These protocols are for reference only. InvivoChem does not independently validate these methods.

    Vatalanib (PTK787) 2HCl

    Effects of PTK787/ZK 222584 on the growth of a xenograft of the human epithelial carcinoma A431, implanted s.c. in BALB/c nude mice. Cancer Res. 2000 Apr 15;60(8):2178-89.

    Vatalanib (PTK787) 2HCl

    Effects of PTK787/ZK 222584 on the tensile strength of an incisional wound in rats. Cancer Res. 2000 Apr 15;60(8):2178-89.

    Vatalanib (PTK787) 2HCl

    Effect of PTK787/ZK 222584 treatment with and after cyclophosphamide on blood cells in normal BALB/c mice. Cancer Res. 2000 Apr 15;60(8):2178-89.


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